Method of and apparatus for detecting the presence of ore deposits in the earth.



R. NELSON.

METHOD OF AND APPARATUS FOR DETECTING THE PRESENCE OF ORE DEPOSITS IN THE EARTH.

APPLICATION FILED APR.3, 1915.

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Patented Nov 1.91?

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METHOD 03H AND'APPARATUS FOR DETECTING THE PRESENCE OF ORE DEPOSITS all echom it may concern."

Be it known that I; RUPERT NELSON, a King. of Sweden, residing at 1356 Eighth avenue, San Francisco, in

h the county, of San Franciscoand State of jGalifornfin have invented new and useful Improvements in Methods of, and Apparatus for Detecting the Presence of Ore Deposits in the Earth, of which the following Tins inventionvrelates to the method of and apparatus for detecting the presence of ore in the earth and has for its primary object the provision of a structure wherein 115 difl'erent metals can be substituted for the electrode that is inserted into the earth so as to tell whether the ore is positively or negatively electrified with relation to the electrode, thus determining into what class the ore belon s.

he inventlon consists in the features of construction, combination, and arrangement of parts, hereinafter fully described and v claimed, reference being had to the accompanying drawings, in which The'figureis adiagrammatic view illustrating the application of the device. In the drawmg, the numerall designates type of electrometer, the quadelectrically connected by wayof conductors 2 and 3 to a source of current 4. The diametrically opposite quadto opposite sides of the battery so as tobe electrified negatively 5 indicates a pointed electrode adapted to be inserted intd the earth and as shown has its upper extremity provided-with a binding post 6 whereby the electrode may be t) electrically connected to the needle? of the electrometer by means ofthe conductor 8. In the application of the device, the electrode is forced into the surface of the earth, recelve an excess 5 of either negatlve or posltlve electrlficatlon,

whereupon the needle will according to whether. the ore is electrified positively or negatively with relation t0 the electrode. If the ore should be positively electrified with relation to the electrode 5,

B the needle would be negatively. electrified and moved under the positive quadrant, this action being increased by the repulsion of the negatively electrified quadrant; To deterrnlne the relation of the electrification cf- 1 the ore with relationto' the electrode, I sub:

THE EARTH.

trometer, the alternately positively and negatively, noting v the deflection Patented Nov at, teat;

stitute diflerent metals for the electrode and notice the deflection of the needle of the electrometer, thus givingvisual'indications as to the relation of the electrification of the ore to the metal forming the electrode, it being. well known that a metal acts positive with relation to onemetal while it will act negative with relation to another metal.

Attention is directed to the fact that, in my device, when the ore is located near the surface of the earth, the action of the electrometer will be greater the depth of the is the retardation of the trometer. v

Having described my invention what I claimis: r 1 1. The method of locating and ascertaining the character of ore bodies whichv conmetal, the greater action of-the elecsists in inserting into the ground an electrode, connect trometer,

g the electrode to an elec sists in inserting into the ground an elec- .trode of a metallic material, connecting the electrode to an electrometer, noting the deflection of the needle, substituting an electrode'of a difl'erent metallic material, and comparing the deflectionobtained in the second instance with the deflection obtained in the first instance. 3. The method of locating and determining the character of ore bodies which consists in inserting into the ground an electrode of some metallic material, connecting the electrode to the vane of a quadrant elecsectors of which are charged of the needle, substituting an electrode of a difl'erent metallic material and comparing the deflection obtained in the second instance with the deflection obtained in the first instance.

In testimony whereof I affin in presence of two witnesses.

stirrer Nansen,

my signature Witnesses:

Prime F. Connnnnn, TV. E; Roman.

oscillatory whereas the noting the'deflection of the needle, substituting an electrode of a 

